NEW
✨ Collagen Peptides
Cost per serving
$4.83
mineral · 12 active deals
The best-value Silica right now is about $0.10 per dose — across 12 tracked products the median is $0.246/dose, so shopping on cost-per-dose can cut your cost several-fold. Every Silica deal here is ranked by cost per dose— what you actually pay per serving, not the sticker price — because forms and absorption differ, so the cheapest bottle isn’t always the cheapest dose.
Right now the best value across our full Silica catalog is at $0.10 per serving.
Silicon is the third most abundant trace element in the body; its bioavailable form, orthosilicic acid, is described in a peer-reviewed review as "important for optimal synthesis of collagen and for activating the hydroxylation enzymes," which is the rationale behind marketing it for hair, skin and nails. The same review is candid about the evidence: it reports "positive results" for hair and "significant improvement in the fragility of nails" in the studies it covers, but immediately adds that "clinical studies evaluating safety and efficacy are still lacking" and that there are "few studies" with proper design and long follow-up. Researchers do not even agree that silicon is an essential element for humans. — per a peer-reviewed review (NIH PMC); not medical advice.
The catalog mixes two things labelled differently, which is why we rank silica by cost per serving rather than per milligram: choline-stabilized orthosilicic acid (ch-OSA, sold as BioSil) is dosed by elemental silicon — studies used about 10 mg silicon/day — while bamboo-extract products state milligrams of silica extract, a much larger number for a different quantity. Comparing those two on a single per-milligram figure would be misleading, so we don't.
The review reports "positive results" for hair strength and "significant improvement in the fragility of nails" in the studies it covers, but states plainly that "clinical studies evaluating safety and efficacy are still lacking" and that "there are few studies" with proper design, large samples and long follow-up. Treat any beauty benefit as preliminary. — per a peer-reviewed review (NIH PMC); not medical advice.
Silicon is the third most abundant trace element in the body and is obtained from the diet (whole grains, some vegetables and drinking water are common dietary sources); a peer-reviewed review notes that orthosilicic acid is "important for optimal synthesis of collagen and for activating the hydroxylation enzymes." The review also states there is "still no consensus among researchers" that silicon is an essential element for humans. — per a peer-reviewed review (NIH PMC).
Per the review, choline-stabilized orthosilicic acid (ch-OSA) "does not present risks for safety" at the doses used in supplements, provided the choline maximum of 3.5 g/day is not exceeded, and a small 4-week trial of another form reported no adverse events. The authors flag a separate concern about nano-silica particles used in some products, for which "concerns regarding the safety have been reported." — per a peer-reviewed review (NIH PMC); not medical advice.
Every Silica deal above is ranked by real cost per dose with no paid placement — see our and .
World Organics Silica 500Mg Tabs 200 at $0.10 — the lowest cost-per-dose silica in our catalog. See the full ranking on the Best Silica page.
We're tracking 12 active Silica deals across Amazon US and partner retailers, ranked by community votes and cost-per-dose — not paid placement.
Across 12 tracked Silica deals the median cost-per-dose is $0.246; the cheapest quartile comes in under $0.178 . Anything below the median is a solid deal for the same molecule.
Deals are submitted by the community and ranked by net votes (hot minus cold) plus cost-per-dose normalised across container sizes. We take no affiliate kickbacks for ordering; sponsored slots, when present, are clearly badged.
The review reports "positive results" for hair strength and "significant improvement in the fragility of nails" in the studies it covers, but states plainly that "clinical studies evaluating safety and efficacy are still lacking" and that "there are few studies" with proper design, large samples and long follow-up. Treat any beauty benefit as preliminary. — per a peer-reviewed review (NIH PMC); not medical advice.
We link primary sources and paraphrase their findings — never copy their text, tables, or images. Cost-per-dose figures are our own first-party catalog data.
Cost per serving
$4.83
Cost per serving
$1.08
60 servings · ~60-day supply
Cost per serving
$0.25
90 servings · ~90-day supply
Cost per serving
$0.19
180 servings · ~180-day supply
Cost per serving
$0.20
120 servings · ~120-day supply
Cost per serving
$0.14
Cheap·−80%120 servings · ~120-day supply
Cost per serving
$0.32
60 servings · ~60-day supply
Cost per serving
$0.11
Cheap·−84%100 servings · ~100-day supply
Cost per serving
$0.42
90 servings · ~90-day supply
Cost per serving
$0.10
Cheap·−85%200 servings · ~200-day supply
Cost per serving
$0.28
Avg·−41%60 servings · ~60-day supply
Cost per serving
$0.24
50 servings · ~50-day supply
Amazon.com · ✨ Collagen Peptides
CPS
Price
$145.00
Amazon.com · 🧠 Choline
CPS
Price
$64.99
Amazon.com · ✨ Collagen Peptides
CPS
Price
$22.74
Amazon.com · ✨ Collagen Peptides
CPS
Price
$34.26
Amazon.com · ✨ Collagen Peptides
CPS
Price
$24.11
Amazon.com · ✨ Silica
CPS
Price
$16.95
Amazon.com · ✨ Collagen Peptides
CPS
Price
$19.29
Amazon.com · ✨ Silica
CPS
Price
$11.29
Amazon.com · ⛏️ Manganese
CPS
Price
$37.99
Amazon.com · ✨ Silica
CPS
Price
$20.73
Amazon.com · ✨ Silica
CPS
Price
$16.95
Amazon.com · 🦴 Calcium
CPS
Price
$11.96
Per the review, choline-stabilized orthosilicic acid (ch-OSA) "does not present risks for safety" at the doses used in supplements, provided the choline maximum of 3.5 g/day is not exceeded, and a small 4-week trial of another form reported no adverse events. The authors flag a separate concern about nano-silica particles used in some products, for which "concerns regarding the safety have been reported." — per a peer-reviewed review (NIH PMC); not medical advice.
Silicon is the third most abundant trace element in the body and is obtained from the diet (whole grains, some vegetables and drinking water are common dietary sources); a peer-reviewed review notes that orthosilicic acid is "important for optimal synthesis of collagen and for activating the hydroxylation enzymes." The review also states there is "still no consensus among researchers" that silicon is an essential element for humans. — per a peer-reviewed review (NIH PMC).
Dosage, upper-limit, deficiency, food-source and interaction facts are sourced from the NIH Office of Dietary Supplements Silica fact sheet. General information, not medical advice.
30 servings · ~30-day supply
